What characterizes transitional communities in an ecosystem?

Transitional communities in an ecosystem are characterized by the presence of organisms that demonstrate dynamic changes, often due to shifting environmental conditions or disturbances. These communities are in a state of flux, where species may colonize, thrive, or diminish as the ecosystem progresses through stages of succession.

For instance, after a forest fire or flooding, a transitional community might initially see fast-growing, opportunistic species take hold before eventually being replaced by slower-growing, more competitive species. This cycle illustrates the nature of transitional communities: they are not static, but rather reflect the transitional phases of ecosystem development, showcasing how certain species can come and go based on a variety of factors including resource availability, environmental changes, and competition. Hence, the defining feature of transitional communities is their inherent instability and the constant change of species composition.